Controlling mechanism



Nov. 23 1926. 1507 680 7 F. L. MACKENZIE CONTROLLING MECHANI SM Filed Feb. 20, 1922 3 Shee ts-Sheet 1 Nov. 23 1926.

7 1,607,680 F. 1.. MACKENZIE I CONTROLLING-MECHANISM Filed Feb. 20, 1922 3 Sheets-Sheet 2 Nov. 23, 1926. 1,607,680

5.3L. MACKENZIE CONTROLLING MECHANISM Filed Feb. 20, 1922 3 Sheets-Sheet 3 //v VENTOF? Patented Nov. 23, 1926.

UNETED STATES emme "PATENT DFFHCE.

FRED L. MACKENZIE, OF BEVERLY, MASSACHUSETTS, ASSIGNOR T UNITED SHOE MACHINERY CORPORATION, OF PATERSOE-T, HEW JERSEY, A CORPORATION OF NEW JERSEY.

CONTROLLING MECHANISM.

Application filed February 20, 1922. Serial No. 537,870.

This invention relates to fastening inserting machines such, for example, as are employed in the maufacture of shoes, andparticularly to improvements in the mechanism by which the operation of such machines is controlled.

This invention is particularly applicable to step-by-step machine's provided with fastening-inserting instrumentalities arranged 19 to insert fastenings successively in the work and to feed the Work between the insertion of successive fastenings. The invention is illustrated as enbodied in a machine designed to insert loosenails, though evidently itis not limited to use in connection with the iusj-zertion of that kind of fastenings.

Such machines are commonly provided with clutch mechanism by means of which the operation of the fastening-insertlng 1n- 20 strunientalities may be initiated and suspended. A. work support also is commonly provided upon which the work is held during the insertion of fastenings. Means is also ordinarily provided for lowering the work support to facilitate the removal of the work therefrom when'the machine is stopped and for raising it after a new piece of worlr has been positioned thereon before or as the machine is again started. This work support is caused to press the Work with considerable force against an abutment or presser plate on the machine, and means is provided for relieving this pressure during the feeding movement of the Work. Such machines for many years were constructed with separate treadlcs to control the raising and lowering of the work support and the starting and stopping of the fastening-inserting and work-feeding; instrumentalities. Later on machines of this type were built provided with a single treadle connected to the work support and the clutch mechanism in such a manner that an operative, by depressing the treadl e, first raised the work support from work-receiving to work-presenting positionand then, by acontinued movement of the treadle, operatedthe clutchto start the machine. This development was a markedstep in advance since it facilitated and sp eeded up the operation of the machine,at the same time reducing the foot work requlred of the operator in depressing and releasing the treaclle. It was St l ecessary, however, for

v 51 thus reducing to a largeextent the force of the machine and minimizing the t'ir'i the operator to lift the work support by his own bodily strength each time the machine was started as well as to compress various springs so as to store energy utilizedto con trol various parts during the stopping of the machine.

Machines of this type operate at a comparatively high speed, ordinarily from three hundred to four hundred or more revolutions per minute. It has not proved practical to embody in these high-speed machines con trolling mechanism of the nature used in cer tain low-speedgang machines, for example heel-attaching machines, in which power supplied through the clutch which operates the fastening-inserting instrumentahties is also utilized to raise the work sup ort before the insertion of the fastenings. The highspeed, step-by-step machines of the type in question provided with a number of cams or other power-transmitting devices arranged to time the motions of various parts of the machine with a high degree of ac cura y in each cycle of operation. If it were attempted to raise the work support by power supplcd through the clutch, it would necessitate either slowing down the machine or crowding" together the other movements of the machine in a manner which would render exceedingly diflicult, if not absolutely impractical, the proper timing of the different motions to be given the parts of the machine in each cycle of operation.

The aresent invention obviates this diiilculty by providing power-operated means for raising the work support which operates prior to the throwing in of the clutch of the machine and therefore does not interfere at 'll with the timing of the motions of the parts of the machine which receive their power throughthe clutch.

This is accomplished in the herein-disclosed embodiment of the invention by an organization in which power-operated means is utilized to raise the work support when the machine is started and subsequently hut almost simultaneously to throw in the clutch which supplies power to the fastening 1nserting and worlcfeeding instrumentalit s which the operative must apply to thetreaolle effect of the machine upon the operativg Such mechanism permits the use of a treadle having a very short throw so that the operative may depress and release it with the lorepartof his foot without moving his heel from the floor, the treadle being at the same time so arrai'iged that it may be depressed through this short distance by a minimum of force. Conversely when the fastening inserting operation has been completed, the release of the treadle permits the throwing out of the clutch and the subsequent lowering of the work support under the control of mechanism provided tor that purpose. Thus the effort necessary for operating a machine of this type is very greatly reduced as compared with that heretofore necessary.

Preferably and as shown the poweroperated means is under the control of the operative who can at any time cause that means to become operative to raise the work support and throw in the clutch. The controlling means, however, when actuated will respond and initiate the operation of the machine only when the work support has been raised to its operative position. Similarly the treadle may be released at any time to halt the insertion of tastenings. The eflect of the release of the treadle will, however, be suspended until a predetermined point in the cycle of operations, in the case of the illustrated machine until the completion of the insertion of the fastening inserted during the cycle in which the treadle is released; then the clutch will be thrown out and the work support immediately lowered. Thus when the machine is started the clutch is thrown in substantially as the work support reaches its raised position and when the machine is stopped the work support starts down just as the clutch is thrown out.

Vhen the connections have been moved to elevate the work support and throw in the clutch, they must be maintained in such posi tion during the continued operation of the machine. Also the work support is Preterably lowered when the operation of the machine is suspended by the throwing out of the clutch. To this end, means'are provided operatively associated with such connections for retaining the work support in raised position and the clutch thrown in and also for rendering the retaining means inoperative on said connections so as to stop the operation of the machine and lower the work support.

The invention further contemplates the provision of novel means for elevating the work support, aside from and without reference to the means employed to effect engagement and disengagement otthe clutch to start and stop the machine. In this aspect the invention contemplates the provision of a member movably mounted on the frame of the machine and operated by a constantly moving shaft and mechanism connected to the work support and comprising an element positioned normally out of the path of movement of said member but arranged for interposition into the path of movement of the member to cause the work support to be raised.

In accordance with another feature of the invention retaining means is provided to maintain the work support in the position to which it is raised by the power-operated means, and the work support is released from the control of the retaining means by means operated by the clutch operating mechanism which controls the operation of the machine thereby permitting the work support to be lowered. As illustrated, the clutch comprises a clutch member moved out of clutching engagement by the power of the machine at a predetermined time in the cycle of operations of the machine and controlled by means having connections to the work support controlling means, such connections having means co-acting therewith for maintaining the work support in raised position and arranged to be rendered inoperative on said connections by means operated by the clutch member moving means so that the work support is lowered substantially simultaneously with the stopping of the machine.

This application is a continuation in part of my application for fastening inserting machines having Serial No. 260,999, filed Nov. 4, 1918, and renewed Jan. 3, 1921, under Serial No. 434,843, as to all subject-matter common to the two.

The invention will be herein illustrated and described in its application to a machine of the type disclosed in Letters Patent of the United States No. 1,030,775, granted June 25, 1912, on an application of George Goddu, for inserting previously formed tastenings, such as loose nails, the machine having incorporated therein controlling mechanism substantially as disclosed by Letters Patent of the United States No. 1,011,941, granted Dec. 19, 1911, on another application of: said Goddu. It is realized however that the use of the invention is not limited thereto, and that it may be employed in other relations including embodiment in fastening inserting machines of other types. Moreover, the mechanism herein set forth as a preferred exemplitication of the invention may be considerably modified without cleparting from the principles thereof. he scope of the invention is therefore to be ited only as required by the appended cia l l ith the above and other objects and Jet tures in view the invention will now be described in connection with the accomp-a drawin s and pointed out in the sub'oined claims. I

1 is a Side elevation of the ase parlUG lit)

tiondof a. fastening? inserting machine embodying. the present invention;

Figs. 2, and arevertical sectional views showing different positions of the poweroperated mechanism by which the clutch and work support are operated and of the controlling moans therefor;

Fig. 5 is a side elevation partly in section of the clutch operating mechanism; and- Fi 6 is a front view of the fastening insertir instrumentalitics carried'by the head of the machine.

The illustrated machine is provided with a raceway 2 (Fig. 6) to which fastenings may be supplied in any usual manner and by which they are-conducted to fastening inierting instrumentslitiei; including a throat inen'iber 1-, a work penetrating and feeding awl 6, and a driver 8 which may be operated, for example, as disclosed in the previously referred to Letters Patent of the United States No. 1,030,775. A suitable work suppant such as a horn 10 carried by ahorn post 12 1) is provided to hold the work in operative relation to the fastening inserting means. The machine is governed in its operation by a. clutch having driving sur face 1 1- and a breaking surface 16, (Fig. 5) operating substantially as disclosed in the patent just referred to. This machineoperates to insert fastenings in succession, continuing. or repeating the. operation as long as its treaflle is held depressed and its clutch in power transn'iitting condition.

it. pulley 18 carried by a suitable stud shaft 20 1 '1' ()1l11 l8Cl in the base of the column of the machine is continuously rotated from any suitable sou-roe of powersuch as a. motor Rotating with the pulleylS-is an eccentric the strap 26 of which is connected by a. link 28 to a pin 30 carried by a slide n'iountcd for reciprocation in ways carried by a bracket 34; secured to thebase of the machine. Slide 32 is thus continuously reciprocated and may conveniently be referred to as the live slide.

A second slide 36, normally stationary when the machine is at rest isalso reciprocably mounted in ways carried. by the bracket Pivoted in an opening. formed in slide 36 is a latch member 38 formed with a shoulder 40 which, when latch member 38 moved into the position of Fig. 3, is engaged by a hardened block 42 carried by-the live slide so. that slide. 36 is raised with slide; 32. from the position of Fig. 2 to the position of Fig. 1. A spring- 13:.tendsto move latch member 38 to the; inoperative position. of Fig. 2. The raisingof Slllfi: 36 will. be more fullyhereinafter described operates to raise the worksupport. and: to throw in the clutch to start the; machine;

Pivoted at 14 to the: lower end of, slide 36 is a lever 46 fulcrumed at148 on; a. block 501mounted for limitedi sliding movement in,

ways formed: in. bracket A link 52. connected at one end to lever 46 and at the other end to a cam bearing lever 54: fulcrumed on a pin 56 carried by the column of'the machine. The end of lever 5i remote fromlink 52 is formed as a cam surface co-operating with a roll (SOcarried'by part 62 of a two-part lever 62, 6i operative. through.toggle.1nechanism66 to control the raising and the lowering of the horn when link 7 6' to a lever 78 forming part of the clutch operatingmechanism already referred to. A spring 80 bearing at one end upon a lug 84 formed upon sleeve 71 and at the other against any suitable abutment such as a collar 86 carried by a rod 88 (hereinafter more fully described) tends to rock lever 72 in a counter cloclm'ise direction as viewed in Fig. 5. A suitable amount of lost motion is permitted between rod 70 and sleeve 71 so that when slide 36 is elevated the work support maybe raised before lever 72 is rocked with the resulting throwing in of the clutch. Preferably this lost motion is so regulated that the clutch is thrown in just as orimmcdiately after the work support reaches its l'iighest position. On the other hand when the machine is stopped and slide 36 starts down under the control of latch mechanism hereinafter to be described, lever 72, under the influence of spring 80, follows rod 70 down. so that the clutch will be moved to stopping position as soon as the machine reaches the appropriate point in its cycle of operation. The latch mechanism just referred to operates to prevent rod 70 from moving a sufficient distance to permit the lowering of the work support until after the clutch has been rendered. inoperative and the machine stopped.

Fulcrumed at to the base of the machine is a treadle 102 the rear of which is suitably connected. as at 104, 106 to the abovementioned. rod 88 which is mounted for vertical sliding movement. A spring 112, more powerful than spring 80, bearingat one end against a collar-114C clamped upon rod 88 and at the other end against an abutment 116 carried by the column of the machine tends to depress rod 88- andto elevate treadle 102. Theraisingof 'rod88 a small amount, which may be-;efi"ectedby the. depression of tree-die 1 02 a distance which may advantageously be; less than an inch, results by mechanism nowto beade'scribed,. inr the movement. of latch niimbeniifiitronrthe po itiongof: Fig; 2to-.-the

position of Figs. 3 and 4 with the consequent starting of the machine.

A lever clamped to a pin 122 having a bearing in bracket 34 is provided with an arm extended between a pair of collars 124, 126, clamped to red 88 so that the elevation of the rod rocks the lever in a clockwise direction as viewed in Fig. 1, and with a second arm arranged'for engagement with a stop such as an adjustable screw 132 to limit the downward movement of rod 88. Also fast upon pin 122 is an arm 134 formed near its upper end with a shoulder 136 and carrying at its lower end a spring-pressed plunger 138 bearing against latch member 38 and in position to move it to the position of Fig. when lever 120 is rocked by the raising of rod 88. Journaled upon pin 122 is a latch member 140 formed at its lower end with a shoulder-engaging surface 142 operative under different circumstances to engage either one of a pair of stepped shoulders 144, 146 formed upon slide 36. Near its upper end latch member 140 is formed with a projecting finger 148. A tension spring 150 anchored at one end to finger 148 and at the other end to a pin 152 carried by the lower end of arm 134 tends to hold finger 148 in engagement with the shoulder 136 of arm 134 and thus tends to rock latch member 140 in a clockwise direction as viewed in Figs. 1, 2, 3 and 4 when rod 88 is raised. Thus the depression of treadle 102 results in the movement of latch members 38 and 140 from the position of Fig. 2 to the position of Fig. 3, this taking place as soon after the depression of the treadle as slide 32 reaches its lowermost position. The engagement of shoulder 40 of. latch member 38 above plate 42 results in th elevation of slide 36 as slide 32 moves upward, the lower end of latch member 140 being of such a shape as to permit that latch member to move against the tension of spring 150 as slide 36 is elevated so that as slide 36 reaches its uppermost position latch member 140 assumes the position shown in full lines in Fig. 4. Slide 36 is thus held in its raised position when slide 32 starts down and is so held during the insertion of fastenings or as long as treadle 102 remains depressed. As long as slide 36 is thus held in its elevated position the machine continues to operate to insert fastenings in the work carried by the work support, the latter being released however in the usual manner at the appropriate point in each cycle of operation oi the machine to permit the feeding of the work.

Means which will now be described is provided for preventing rod 88 from moving, when treadle 162 is released, more than the shortdistance necessary to throw out the clutch until after the completion or" the cycle of operation during which the treadle is released. This small movement of rod 88 is slide 36 manually.

not sufficient to permit any lowering movement of the work support so that it is thus insured that the last fastening will be completely driven. Connected at to an e tension 162 off the cam roll bearing lever of the clutch operating mechanism (Fig. 5) is a rod 164 surrounded by a spring 166 bearing at its lower end against a collar 163 clamped to the rod and at its other extremity against an abutment 170 carried by the frame of the machine. Bod 164, which is thus continuously reciprocated during the operation or" the machine by the co-operative action of the clutch cam 171 and cam roll 173, is connected at its lower end to a bell crank lever 172 tulcrumed on bracket and having pivoted to its upper extremity a finger 174 carrying at its outer end an ad justable bearing screw 176 having a rounded end engaging a finger 178 extending from collar 126 (Figs. 1 and A. tension spring 180 anchored at one end to finger 174 and at the other end to a pin extending from lever 172 serves to hold the lower end of screw 17 6 in sliding engagement with finger 178 as bell crank lever 172 is rocked by the reciprocation of rod 164. A notch 182 is formed in the upper extremity of latch mem ber 140. While the machine is running the elevated position of finger 17 8 serves to lift finger 174 and thus holds the extremity of finger 17 4 above the upper end of latch member 140. hen treadle 102 is released and rod 88 is lowered latch member 140 is moved from the full line to the dotted line position movement of rod 70 to permit the throwing out of the clutch but is insufiicient to permit any lowering of the work support. There after, and at substantially the same instant as the throwing out ot' the clutch, rod 164 is elevated by the counter clockwise movement (as viewed in of lever arm 162. Since prior to this time finger 178 has moved down from the position of Fig. 3, the ex:- tremity of finger 174 permitted to engage notch 182 of latch member 140. quent upward movement 01? rod 164 and the corresponding movement of finger 174 to the left as viewed in Figs. 2 to 4 result in rocking latch member 140 from the dotted line position oi? Fig. 4 to the position of Fig. 2. Slide 36 is thus released and moves to its lowermost position.

It may occasionally be desired to race For example in making certain adjustments it may be necessary or convenient to raise the work support without throwing in the clutch and starting the operation or the machine. Accordingly a second treadle is provided, the rear end of which is connected through a rod-,192

The subseand a spring 194 with a sleeve 196, the upper extremity of which bears against the lower end'of slide 36. By means of treadle 190 slide 36 may be elevated a sufiicient distance to raise the work support to operative position Without throwing in the clutch; or if treadle 190 is depressed through its entire throw the work support may be raised and the clutch thrown in to cause the insertion of fastenings, this being at times advantageous it it is desired to insert a single, accurately located fastening. It may be noted that when the machine is operated under the control of treadle 102 and the power-operated work support and clutch controlling mechanism, sleeve 196 and spring 1294 act as a bullerto cushion the fall of slide 36.

Having described my invention, what I claim as new and desire to secure by Letters Patent or the United States is:

1. A machine arranged, when started, to operate continuously and thereby to perform an operation aplurality of times in rapid succession having, in combination, cyclically operating mechanism, a work support, a clutch ior transmittingpower to cause operation of said mechanism, ana mwererated means for raising the work's'upport prior to the starting of said mechanism and for throwing in said clutch.

2. In a inachine of the class described, a work support, a clutch for controlling 'the operationof the machine, and operator-controlled, continuously running, power-operated means for raising the work'su'pport and throwing in the clutch. ,v

3. in a machine of the class described, a work support, a clutch for controlling'the operation ot' the machine, continuously running, power-operated cyclically operating means operable at a predeterminedtime in its cycle of operationstor raising thework support and throwing in the clutch, and controlling means operable at any time in the cycle of operations of said power-operated means for causing the power-operated means at a predetermined time in its cycle oi operations to operate to raise the work support and throw in the clutch.

4. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections be tween the work support and the clutch, and power-operated means operable on said connecti'ons to raise the work support and throw in the clutch and to maintain the clutch in power transmitting through a plurality of cycles of operation.

in a machine of the class described, a work support, a clutch for controlling the operation of vthe machine, connections between the work support and the clutch,

mwenoperated means operable on said connections to raise the worksupport and throw condition in the clutch andtdmaintain the clutch in power-transniitting condition through a plurality of cycles of operation'of the machine, and. means tor controlling the movementof Said connections in a 'direction'to lower the wor support andthrow out the clutch.

Ina lll21Cl1i1l(r()t ti 1B class described, a work support, 'aclutch forcontrolling the operation of the machine, connections between the work support and clutch, poweroperated means operable on said connections to raise the work sup iibrt and throw in the clutch, and operator-controlled and machine-controlled means for controlling the. movement of said connections in a direction to lower the work supportand'throw out the clutch.

7. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, a slide connected tothe work support and clutch, and'power operated means for operatingsaid 'slideto raise the work support and. throw in the clutch. I

r 'In a machine of the class described, a work support, a clutch operable when thrown in to cause'repeated operation of the machine, connections between the work support and clutch, normally inoperative power-operated means for operating 'on s'aid connections to raise the'work s'ripport and throw in the clutch, and operator-controlled means for rendering said power-operated means operative on said connections.

9. In a machine of the class described, a work support, a clutch foncontrollingthe' operation of the machine, connections between the work support and clutch, normallyinoperative power'- o ')erated means for operating on said connections to l'raise the worksup 'iort and throw in the clutch, a member operatively associated with said con nections and arranged to be in'terpo'sedin the path of movement of the power-operated means to render said means operative on said connections, and operator controlled' means for interposing said member into the path of movement of the, means, I c

-10.'In-amachineof the class described, a work support, aclutch for controlling-the operation of the machine, connections between the work support and clutch,,poweroperated means for operating said connections so as toraisethe work support and throw in'the clutch, andineans foiretain ing the connections in a position'to maintain the work support inraisediposition and the clutch thrown in.

11. In a machine of the-class described, a worksupport, a clutch for controllingthe operations of the machine, connections-between tllE V Olk support :and clutch, normally inoperative power-operated means for power-operated operating on said connections to raise the work support and throw in the clutch, operator-controlled means for rendering said poweroperated means operative on said connections, means co-acting with said connections to maintain the clutch thrown in and the work support raised, and n'ieans operated by said operator-controlled means for rendering said maintaining means inoperative on said connections.

12. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections between the work support and clutch, normally-inoperative power-operated means for operating on said connections to raise the work support and throw in the clutch, a member operatively associated with said connections and arranged to be interposed in the path of movement of the power-operated means, a shaft disposed adjacent to said connections, mechanism carried by said shaft and operable to interpose said member into the path of movement of the power-operated means to render said means operative on said connections. means for retaining the connections in position to maintain the work support raised and the clutch thrown in, and means for disengaging said retaining means from said connections upon movement of said mechanism away from said member.

13. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections between the work support and clutch, normally-inoperative power-operated means for operating said connections to raise the work support and throw in the clutch, a member operatively associated with said connections and arranged to be interposed in the path of movement of the power-operated means to render said means operative on said connections, a shaft disposed adjacent to said connections, mechanism carried by said shaft and operable to interpose said member into the path of movement of the power-operated means so as to cause said connections to be operated, means carried by the shaft for retaining the connections in position to maintain the work support raised and the clutch thrown in, means for moving said mechanism away from said member to permit said member to pass out of the path of movement of said power-operated means and for withdrawing said retaining means for engagement with said connections, and means on said shaft arranged to arrest the connections after movement thereof sufficient to throw out the clutch, said connections being constructed to maintain the work support in raised position during such move ment of the connections.

14. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections between the work support and clutch, means operatively connected with such connections for maintaining the work support in raised position and the clutch thrown in through a plurality of cycles of operation of the machine, and means for rendering said maintaining means inoperative on said connections.

15. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections between the work support and clutch, means operatively associated with such connections for maintaining the work support in raised position and the clutch tl'iro'wn in, and operator-controlled means for rendering said maintaining means inoperative on said con-- nectlons.

16. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections be tween the work support and clutch. shoulders on said connections, means arranged for engagement with one of said shoulders to maintain the connections in position with the work support raised and the clutch thrown in, and means to engage the other of said shoulders to maintain said connections in a different position.

17. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, a slide connected to the work support and clutch, shoulders on said slide, means arranged for engagement with one of said shoulders to retain the slide in position with the work support raised and the clutch thrown in, connections between the slide and work support con structed to maintain the work support in raised position upon movement of the slide to a position to cause the clutch to be thrown out and means operatively connected with said first-mentioned retaining means and arranged for engagement with the other of said shoulders to retain the slide in such last-named position.

18. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, a slide connected to the work support and clutch, shoulders on said slide, means arranged for eng' ment with one of said shoulders to mainta i the slide in position with the work support raised and the clutch thrown in, connections between. the slide and work support constructed to maintain the work support in raised position upon movement of the slide to a position to cause the clutch to be thrown out, means operatively connected with said maintaining means and arranged for engagement with the other of said shoulders to retain the. slide in such lastnamed position, and means operated submemes :jtantially simultaneously with the throwing out of the clutch for releasing said last-mentioned maintaining means to permit lowering of the work support upon the stopping of the machine.

19. In a machine ofthe class described, a work support, a clutch for controlling the operation of the machine, connections be tween the work support and clutch, means co-acting with said connections operable to maintain the clutch thrown in and the work support in raised position through a plurality of cycles of operation of the machine, means for releasing said maintaining means, means co-acting' with said connections to maintain the same in a position to cause the clutch to be thrown out and the work support to continue in raised position, and means for releasing said last-named maintaining means to permit the work support to be lowered substantially simultaneously with the stopping of the machine.

20. In a machine of the class described, a frame, a constantly rotating shaft carried by said frame, a member movably mounted on said frame and operated by said shaft, a work support, mechanism operatively connected to the work support and comprising an element positioned normally out of the path of movement of said member, means for moving said element into the pa h of movement of said member to cause the work support to be raised by said member, and means separate from said mechanism for lowering the work support periodically to permit the work to be fed.

21. In a machine of the class described, a frame, a constantly rotating shaft carried by said frame, a member movably mounted on said frame and operated by said shaft,

a work support, mechanism connected to the work support comprising an element positioned normally out of the path of movement of said member, treadle-controlled means for moving said element into the path of movement of said member to cause the work support to be raised by said memher, and means operatively connected with the treadle-controlled means for maintaining the work support in raised position.

22. In a machine of the class described, a frame, a constantly rotating shaft carried by said frame, a member movably mounted on said frame and operated by said shaft, a work support, mechanism connected to the work support comprising an element positioned normally out of the path of movement of said member, means carried by the frame in position when operated to shift said element into the path of movement of said member, operating means for said shifting means movable by the operator in opposite directions between two limits f movement, and mechanism for maintaining the work support in raised position when said operating means is at the limit of its movement in either direction.

23. In a machine of the class, described, a frame, a constantly rotating shaft carried by said frame, a member movably mounted on said frame and operated by shaft, a work support, a slide connected to the work support and iounted in said frame, an element carried by said slide positioned normally out of the path of movement of said member, mechanism on said frame arranged for engagement with said element when the slide in position to lower the work support, means for operating said mechanism to interpose said elementinto the path of movement of said member so that said member operates'to raise the work support, means operatively connected to said operating means for maintaining the work support in raised position, andmeans for automaticallyrendering the worksupport maintaining means inope atiVeQ 24. In a machine of the class described, a

frame, a constantly rotatingshaft carrie'zil by said frame, a member movably mounted on said frame and operated by said shaft, a

work support, a slide connected to the work support and mounted. in said frame, an element carried by id slide positioned normally out of the path of movement of said member, a shaft, a bell crank lever car 'ied by said shaft and having a depending portion arranged for engagement with said element when the slide is in position to lower the work support, operator-controlled means for operating said lever to interpose said element into the path of movement of said member to initiate the raising of the work support, and an shaft constructed for. locking engagement with said slide to maintain the work sup port in raised position. i

25. In a machine of the class described, a

frame, a constantly rotating shaft carried by said frame, a member movably mounted. on said frame and operated by said shaft, a work support, a slide connected to the work support and mounted in said frame, an element carried by said slide positionec normally out of the path of movement of said member, a shaft, a bell crank lever carried by said shaft and having a depending portion arranged for engagement with said element when the slide is in position to lower the work support, operator-controlled means for operating said lever to interpose said element into the path of movement of said member to initiate the raising of the work support, an arm mounted on saic shaft constructed for locking engagement with said slide to maintain the work support in raised position, and a yielding connection between said bell crank lever and said ari arranged to move said arm into locking engagement with said slide upon actuation of arm mounted on said Ell) the bell crank to eii'ect raising of the work support.

26. In a cyclically operating machine, a work support power-operated means for raising the work support, means operable to maintain the work support in raised position during a plurality ot cycles of operation of the machine, clutch mechanism for controlling the operation of the machine, and means operated by the clutch mechanism for releasing the work support maintaining means to permit the work support to be lowered.

2'7. In a machine of the class described, in combination, a work support, a clutch con prising a movable clutch member, work sup port controlling means, clutch controlling means, means for operating said clutch member, connections between said clutch controlling means and said work support controlling means, means co-acting with said connections operable to maintain the work support in raised position during a plurality oi cycles of operation of the machine, and means operated by said clutch member operating means for releasing said maintaining means to permit lowering of the work support.

28. In a machine of the class described, in

combination, a work support, a clutch comprising a movable clutch member, work support controlling means, clutch controlling means, means for operating said clutch member, connections between said clutch controlling means and said work support controlling means, means co-acting with said connections for maintaining the work support in raised position and the clutch thrown in, means for rendering said maintaining means inoperative on said connections, means for limiting the movement of said connections to a point to cause said clutch controlling means operatively to connect said clutch member with said clutch member operating means while continuing to maintain the work support in raised position and means operated by said clutch member operating means for rendering said limiting means inoperative substantially simultaneously with the throwing out of the clutch member by said clutch member operating means to permit the work support to be lowered when the machine is stopped.

29. In machine of the class described, a work support, clutch mechanism for controll' k the operation of the machine con- :tructcd to stop the machine at a predetermined point in the cycle of operations of the machine and comprising clutch controlling means operable at any time in the cycle of operationsof the machine to cause the machine to stop at such predetermined point of its operation, a work support, a member connected to said clutch-controlling means and said work support, manually controlled means for maintaining said member in a position to maintain the work support in raised position and to throw in the clutch, means for latching said member when released by said manually controlled maintaining means in a position to operate the clutch controlling means, means controlled by said clutch for releasing said member from said latching means to permit movement of said member from latching position, and connections between said member and the work support constructed to maintain the work support in raised position regardless of the movement oi said member from said first-mentioned position to said second-mentioned position and to lower the work support upon further movement 0t said member subsequent to the release ot said member from the control of the latching means.

30. In a machine of the class described, a clutch for controlling the operation of the machine, power'operated means for throwin in the clutch, means for disconnecting the clutch from the power-operated means, and means independent of the lirst-naincd power operated means and operated by the power of the machine "for throwing out the clutch at a predetermined time in the cycle of operations of the machine to stop the machine.

31. In a machine of the class described, a clutch for controlling the operation of the machine, power-operated means for thr0wing in the clutch, operator-controlled means for rendering the power-operated means operative on the clutch, and means operatively connected with the operator-controlled means for maintaining the clutch thrown in.

32. In a machine of the class described, a clutch for controlling the operation of the machine, a slide connected to said clutch, power-operated means for operating said slide, and treadle-controlled means for operatively connecting said slide and said power-operated means.

33. In a machine of the class described, means for operating repeatedly on shoe stock, means for controlling the shoe stock in the field of operation of the operating means during repeated operations on the stock, a clutch for controlling the operating means, and power-operated means for actuating the stock controlling means and for throwing in the clutch to cause the machine to operate repeatedly on the stock.

34. In a machine of the class described, means for operating repeatedly on shoe stock, means for clamping the shoe stock, a clutch for controlling the operating means, and power-operated means for actuating the clamping means and throwing in the clutch to cause the operating means to operate repeatedly on the stock.

35. In a machine of the class described, means for inserting fastenings successively Til into shoe stock, a clutch for controlling the fastening inserting means, mechanism operable on the shoe stock to facilitate the insertion of fastenings into the shoe stock, and power-operated means for actuating said mechanism and throwing in the clutch to cause the successive insertion of fastenings.

36. In a machine of the class described, clutch mechanism constructed to stop the machine at a predetermined time in the cycle of operations of the machine, a work support, power-operated means for raising the work support and throwing in the clutch, operator-controlled means for rendering the power-operated means inoperative on the work support and clutch mechanism and for initiating the operation of the clutch mechanism to stop the machine, and means operated by the clutch mechanism to lower the work support substantially simultaneously with the stopping of the machine.

37. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, power-operated means operable at a predetermined point in the cycle of operations of the machine for raising the work support and throwing in the clutch or for throwing out the clutch and lowering the work support, and controlling means operable at any time during the operation of the machine for causing operation of the power operated means to throw out the clutch and lower the work support at such predetermined point in the cycle of operations of the machine.

38. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, and a poweroperated eccentric for raising the work support and throwing in the clutch.

39. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, a power driven eccentric for raising the work support and throwing in the clutch, a treadle operable at any time during the operation of the machine to stop the machine, and connections from the treadle 'to the clutch and work support for causing the throwing out of the clutch and the lowering of the work support at a predetermined point in the cycle of operations of the machine.

40. In a machine of the class described, a work support, a clutch for controlling the operation of the machine, a slide connected to the work support and clutch, and a power operated eccentric for operating the slide to raise the work support and throw in the clutch.

ll. A metallic fastening inserting machine having, in combination, a work support, a continuously driven eccentric for raising said work support, and a latch arranged to hold the work support in raised position.

chine havin in combination. a work su port, a power operated, continuously reciprocated slide, a normally stationary slid-e adjacent thereto, connections from said normally stationary slide to said work support, and a latch operable under the control of the operative for causing said continuously reciprocated slide to move said normally stationary slide and through said connections to raise said work support.

44. A metallic fastening inserting machine having, in combination, a work sup port, a clutch, and power operated means for raising the work support and for throwing in the clutch in timed relation thereto to cause the machine to operate through a plurality of cycles of operation.

l5. In a machine of the class described, a continuously driven slide, a normally stationary slide, a latch operable under the control of the operative tc connect said s des thereby to cause the continuously eriven slide to move the normally stationary slide, a second latch arranged to act subsequent to said first-named latch to retain said normally stationary slide in the position to which it has been moved by said first-named latch, and a work support under the control of said normally stationary slide.

it In a machine of the class described, a clutch, a work support, power operate 11162115 for raising the work support, a latch operable to retain said work support in raised position, a treadle, and connections from the treadle to the clutch and to the work support arranged to throw out the clutch, after movement of the treadle to stop the machine, at a predetermined point in the cycle of operations of the machine and thereafter to lower the work support.

4L7. A machine of the class described having, in combination, a work support, a clutch for controlling the operation of the machine, power-operated means for raising the support and throwing in the clutch, and a member arranged when in one position to maintain the clutch and the work support in operative position and when in another position to permit the release of the clutch but still to maintain the work support in operative position.

48. A machine of the class described, hav ing, in combination, a work support, a clutch for controlling the operation of the machine, a slide connected to the work support and clutch, power-operated means for moving the slide to aise the work support and the work support in operative position but to permit the release oi the clutch.

i9. A machine of the class described having, in combination, a work support, a movable slide arranged when in one position to maintain the work support in operative position and to cause operation of the machine and when in another position to maintain the work support in operative position and to permit the stopping of the machine, and a latch member under the control of the operative and arranged to hold said slide in either of said two positions.

50. A machine of the class described having, in combination, a work support, a clutch for controlling the operation of the machine, power-operated means operable at a predetermined point in the cycle oi operation of: the machine to raise the work support and throw in the clutch and operable also to stop the machine, and a member under the control of the operative for causing said power operated means, when operated to stop the machine, first to throw out the clutch and thereafter to lower the work support.

51. A machine of the class described having, in combi ation, a work support, a clutch, a latch member, and connections from the latch member to the work support and clutch, the latch member having three positions in one of which it maintains the clutch and work support in operative position, in a second of which it maintains the work support in operative position, and in the third of which it maintains neither the clutch nor the work support in operative position.

52. A machine of the class described having, in combination, a work sup 'iort, a clutch for controlling the operation of the machine, a slide, connections "from the slide to the clutch arranged, when the slide is brought into 0 )erative position, to cause the throwing in of the clutch, a lever pivoted to the slide and rocked by the movement of the slide to operative position, and connections from the lever to the work support arranged to move the work support into operative position prior to the throwing in of the clutch.

53. A machine of the class described having, in combination, a continuously powerreciproca'ted slide, a second slide arranged to control the operation or" the machine, a latch, a controller, connections from the controller to the latch arranged to cause movement of the controller to shift the latch so as to cause the continuously reciprocatedslide to move the second slide into position to cause the operation of the machine, and a latch member operative to maintain said second slide in position to cause the continued operation of the ma hine and 1nov able, upon the return 01 the controller to its normal position first, to an extent to permit said second slide to move only part of the distance from operative to inoperative position, and after a short dwell to permit said second slide to move to inoperative position.

54k. A machine or" the class described how ing, in combination, fastening inserting means, a clutch for controlling the operation thereof, a work support, a slide, power-opa0 erated means for moving the slide into position to throw in the clutch and raise the work support, a latch member arranged to maintain the slide in said position, and means operable to withdraw the latch meinher to an extent suilicient to permit the throwing out oilthe clutch and insuliicient to permit the lowering of the work support.

55. A machine of the class described having, in combination, fastening inser means, a clutch for controlling the operation thereof, a work support, a slide, powenoper ated means for moving the slide into position to throw in the clutch and raise the work support, a latch member arranged to maintain the slide in said position, means operable to withdraw the latch member to an extent suldcient -to permit the throwing out of the clutch and insutiicient to permit the lowering of the work support, and means for thereafter moving the latch member into position to permit the lowering of the work support.

56. A machine of the class described having, in combination, a clutch arranged to control the operation of the machine, a sl' l having a pair 01' latch engaging surtac latch member arranged to engage one of said surfaces during the operation oi the machine and to engage the other of said s 1h faces when the machine is to be e ,k permit the throwing out oi? the clutch prior to the movement oi other parts or the machine to their normal inoperative position.

57. A machine of the class described hav-- ing, in combination, a work support, fastening inserting instrumentalities, a clutch tor controlling the operation thereof, a cam,

connections from the cam to the clutch. means for breaking and making said connec-- tions to cause the throwing in and out o t the clutch, a latch arranged to maintain said connection breaking and making me position to hold said connections broken ant arranged when in another position to perm the making of said connections to cans t. c in to move the clutch into inoperative position while at the same time holding t'hi Work support raised, and means operated by said, cam to move the latch to inoperative position coincident with the throwing out of the clutch to permitthe lowering of the work support.

58. A fastening inserting machine having, in combination, a work support, fasten ing inserting instrumentalities, means for raising the work support into operative re .lation to said fastening inserting instrumenraising the work support into operative ,re-

lation to said fastening inserting instrumentaliti-es comprising a slide, a lever connected to said slide, and connections from the lever to the work support whereby movement of the slide is transmitted through the lever to the connections to cause the raising and lowering oi? the work support.

(30. A machine of the class described having, in combination, a continuously driven slide, a i'iormally stationary slide a latch operable under the control the operative to connect said slides thereby to cause the continuously driven slide to move the normally stationary slide, a second latch arranged to not subsequently to the first named latch to retain said normally station ary slide in the position to which it has been moved by said first named latch, a clutch and a work support under the control of said normally stationary slide, means operable to cause said first-named latch to disconnect the two slides and at the same time to cause said second-named latch to allow movement of the normally stationary slide to an extent sutficicnt to permit the throwing out oi the clutch but insufiicient to permit the lowering of the work support, and means operative synchronously with the throwing out of the clutch completely to 'withdraw said second-named latch "from the normally stationary slide so as to permit the normally stationary slide to move into position to cause the lowering of the work support.

61. A machine of the class described having in combination, a clutch, a work support, a latch having two operative positions in both of which it holds said work support in raised positions and in one of which it maintains the clutchin operative condition, a treadle, and connections from the treadle to the clutch and to the Work support arranged to cause movement of the latch, after movement of the treadle to stop the machine, to permit the throwing out of the clutch without lowering of the work support at a predetermined point in the cycle of operation of the machine and thereatterto move the latch into position to permit lowering of the work support.

62. A machine of the class described having, in combination, a clutch, work snoport, and a latch having two operative positions in both. of which it holds said work support in aised position and in one of which itmaintains the clutch in operative condition. 7

63. A slide for controlling the operation of a machine, provided with a pair of latch engaging surfaces by the engagement of which the slide may be held in either one of two definite positions.

(i l. A machine of the class described having, incombination, a slide, means for moving the slide to a definite position to cause the continued operation of the machine, and alatch member, the slide being formed with two surfaces arranged for engagement by he latch member to maintain the slide in said definite position or to permit its more nent therefrom while restraining it from movement to its normal inoperative position.

(35. In a machine for operating on shoe stock, a constantly reciprocating slide serving as a source of power for the machine, a second slide adapted to be connected to the first mentioned slide, and means under the control of the operator for causing the slides to be operatively connected.

66. In a machine 'for operating on shoe stock, a constantly reciprocable slide serving as an immediate source of power for the machine, a second slide adapted to be operaiively connected to the firstunentioned slide so as to be moved thereby to a predetermined operative position, means for locking the second slide in said operative position, and means under the control of the operator for causing the operative connection of the slides and for releasing the second slide from the locking means.

67. In a machine for operating on shoe stock, a constantly reciprocable slide, power means for reciprocating the slide while the machine otherwise is at rest, a second slide adapted to be operatively connected to the first slide, a manually operable member for causing operative connection between the slides, a member for locking the second slide in .the extreme position to which it is moved by the first slide, said second slide having two abutments with one of which the loclr ing member may co-operate to lock the slide .at the extreme limit of its movement in one direction, the other abutment serving to lock the slide slightly retracted from its extreme position, and connections controlled from the manually'operable member for causing unlocking of the second slide from its extreme position and its retention in the slightly re tracted position.

ll ll 68. In a machine for inserting fastenings in shoe stock while the latter is clamped temporarily during the insertion oi each fastening, a constantly reciprocable slide serving as an immediate source of power for the machine, a second slide adapted to be operatively connected to the first-mentioned slide to be moved thereby to the position it occupies while the stock is clamped for the insertion of tastenings, a locking member for holding the second slide in its operative position while the first-mentioned slide continues to reciprocate, and a manually operable member for causing operative connection between the slides and for releasing th second slide from its ertren'ie operative positi"n when it is desired to terminate the clamping of the stock.

69. in a machine lior inserting iastenine s in f t, a constantly reciproca-ble l Slide, a econd slide adapted to be operatively connected to the first-mentioned slide to be moved thereby to the extreme limit of its moire i one direction, locking; means in tor holcing the second slide at the said limit of its movement during all of the time of the insertion oi: the fastenings, a manually o rable member for releasing the second. Sli from its extreme position to an intermediate position determined by the locking means, and power means for releasing the slide from said intermediate position at a predetermined point in the cycleof opera tions.

'Zttln a machine for operating on shoe stock, a constantly reciprocable slide serving to transmit power to the machine, a second slide adapted to be operatively connected to the first-ment oned slide so as to be moved thereby to a predetermined operative position, means for locking the second slide in said operative position during continued reciprocations of the first slide, and means ilndcr the control of the operator for releasing the second slide from the locking means.

71. In a machine for operating on shoe stock, a constantly reciprocable slide, power means for reciprocating the slide while the machine otherwise is at rest, a second slide adapted to be operatively connected to the lirst slide, a manually operable member for causing operative connection between the slides, a member for locking the second slide in the extreme position to which it is moved by the first slide, said second slide having a. plurality of abutments with which the locking member may co-operate to lock the slide selectively in a number of positions, one abutmentserving to lock the slide slightly retracted from its extreme position, and connections controlled from the in shoe stock, a constantly rec! manually operable member for causing unlocking of the second slide so that it may return to its initial position occupied while the machine is at rest.

72. In a machine for inserting taster-in s ocabic slide, a second slide adapted to be open/lively connected to the lirst-mentioned slide to be. moved thereby to the e :treme limit of its movement in one dir cti a loc 1g means for holding the second slide at the said limit of its movement durii all of the time of the insertion of the A s, a manually operable member t ting the release of the second slide from its extreme operative position, and power means for releasing; the slide at a predetern'iined point in the cycle oi operations.

in a machine of the class described, a work support, a clutch for controlling the operation of the machine, connections between the work support and the clutch, poweraerated means for operating said connect-ions to raise the work support and throw in the clutch, a. manually operated controller displaceable to render said poweroperated means operative upon said connections, and means for retaining; the connections in a position to maintain the work support in raised position and the clutch thrown in as long as said controller is maintained in displaced position.

7%. A 3tastening-inserting machine operating step by step to insert a plurality of 'l'astening's in succession having, in combination, a work support, a continuously driven eccentric operable to raise the work support preliminarily to the insertion of a group of tastenings, and a latch operable to hole the work support in raised position through a plurality of cycles of operation of the machine during the successive insertion oi tastenings.

" A. cyclically operating; fastening-in- 4 o. sorting machine operable to insert tastenings successively having, in combination, a work support, a clutch, power-operated means for raising the work support preliminarily to the insertion of a plurality of tastenings and or throwing in the clutch in timed relation thereto, a manually displaceable controller arranged operatively to connect the poweropcrated mea s and the means for raising the work support and for throwing in the clutch, and means for holding; the Work support in raised position and the clutch in power-transmitting condition as long as the controller is niiaintainec in displaced positon.

in testimony whereof name to this specification 

